Dr. Michael J Stumpf , DO
Surgery • Phoenix, AZ
20940 N. Tatum Blvd. Ste #350
Phoenix, AZ 85050
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
NPI assigned on July 12, 2007; this date does not establish years in practice.
-
Published CMS data list 161 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Published rows only; this is not a quality measure.
-
Published Part B service records, 2022:
- 99215 — Established patient outpatient office visit: 60 service units.
- 99214 — Established patient outpatient office visit: 51 service units.
- 99233 — Subsequent hospital care with moderate levelof medical decision making: 20 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See all 5 records in the table · Guide: How to read Medicare Part B data
-
Published CMS data list 157 Medicare Part D prescriptions, including refills, in 2022.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022. Published rows only; this is not a quality measure.
-
Published Part D records, 2022:
- Linezolid — 34 prescription fills, including refills.
- Ciprofloxacin Hcl — 32 prescription fills, including refills.
- Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) — 31 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 7 records in the table · Guide: How to read Medicare Part D prescriber data
-
Medicare Part B services went from 12 in 2018 to 161 in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018–2022.
Practice Location & Contact Primary Location
20940 N. Tatum Blvd. Ste #350
Phoenix, AZ 85050
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Valley View Physician Practices Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Arizona College Of Osteopathic Medicine Mid Western University
2002
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $23,375 in 2022
The total amount Medicare approved for these services in 2022. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022.
Paid by Medicare
About $18,524 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022.
30-day fills
157 standardized 30-day fills in 2022
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$34,845 in 2022
The total cost of these prescriptions in 2022, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $19.35 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
24 years (graduated 2002)
CMS Doctors and Clinicians data list 2002 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Stumpf has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Stumpf as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Phoenix and Arizona
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Stumpf are from 2022.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Stumpf are from 2022.
171 active clinicians are listed under Surgery with a practice address in Phoenix, AZ (760 in Arizona).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Phoenix
7.6% of these 171 clinicians have the CMS telehealth indicator.
59.1% of these 171 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Medicare Part B services
Medicare Part B services went from 12 in 2018 to 161 in 2022.
- 2018: 12
- 2019: 227
- 2020: 372
- 2021: 318
- 2022: 161
-
Medicare-allowed amount
Medicare-allowed amount increased 1387% from $1,572 in 2018 to $23,375 in 2022.
- 2018: $1,572
- 2019: $17,293
- 2020: $34,453
- 2021: $32,774
- 2022: $23,375
-
Paid by Medicare
Paid by Medicare increased 1382% from $1,250 in 2018 to $18,524 in 2022.
- 2018: $1,250
- 2019: $13,782
- 2020: $27,022
- 2021: $24,775
- 2022: $18,524
-
Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2017 to 157 in 2022.
- 2017: 11
- 2019: 112
- 2020: 89
- 2021: 102
- 2022: 157
-
30-day fills
30-day fills went from 11 in 2017 to 157 in 2022.
- 2017: 11
- 2019: 116
- 2020: 90
- 2021: 106
- 2022: 157
-
Part D drug cost
Part D drug cost went from $61 in 2017 to $34,845 in 2022.
- 2017: $61
- 2019: $1,332
- 2020: $1,057
- 2021: $1,611
- 2022: $34,845
-
Industry payments (Open Payments)
Industry payments (Open Payments) decreased 98% from $1,149.60 in 2020 to $19.35 in 2025.
- 2020: $1,149.60
- 2021: $8,121.58
- 2022: $9,897.83
- 2023: $2,568.02
- 2025: $19.35
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2022), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $19.35.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Ethicon Inc. |
Food and Beverage
In-kind items and services
|
Echelon; Endopath | General | $19.35 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2021 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2022; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
|
60 | 17 | $579.73 | $174.09 |
|
99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
51 | 22 | $537.00 | $96.11 |
|
99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
|
20 | 13 | $355.00 | $98.90 |
|
99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
|
19 | 19 | $685.00 | $192.95 |
|
99205
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
|
11 | 11 | $820.00 | $216.72 |
Source: CMS Part B by Provider and Service, 2022; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2022.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Linezolid | Linezolid | 34 | 520 | $32,887.82 | — |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 32 | 296 | $464.54 | — |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 31 | 174 | $492.08 | 19 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 19 | 177 | $100.60 | — |
| Metronidazole | Metronidazole | 17 | 150 | $157.24 | — |
| Levofloxacin | Levofloxacin | 12 | 133 | $540.05 | — |
| Ibuprofen | Ibuprofen | 12 | 220 | $203.15 | — |
Source: CMS Part D by Provider and Drug, 2022; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-05-20NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20240624001747
NM
8224125711
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Valley View Physician Practices Llc
5300 S Hwy 95, Fort Mohave, AZ 864269251
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 20940 N. TATUM BLVD. STE #350, PHOENIX, AZ 85050 (Tel: 8444367874)
Registered at 29455 N. CAVE CREEK RD STE #118-451, PHOENIX, AZ 85331 (Tel: 8444367874)
Surgery (license number reported to NPPES: AZ 4658)
Registered at 20401 N. 73RD ST. STE #155, SCOTTSDALE, AZ 85255 (Tel: 8444367874)
Registered at 29455 N CAVE CREEK RD STE #118-451, PHX, AZ 85331 (Tel: 8444367874)
Surgery (license number reported to NPPES: FL OS10828)
NPI status registered as active in NPPES database
Registered at 6120 W BELL RD, STE 130, GLENDALE, AZ 853083782 (Tel: 6235124326)
Registered at 3815 E BELL RD, STE 2200, PHOENIX, AZ 850322122 (Tel: 6029950822)
Recorded as MICHAEL STUMPF, D.O.
Surgery (license number reported to NPPES: FL OS10828)
NPI status registered as active in NPPES database
Registered at 3815 E BELL RD, STE 2200, PHOENIX, AZ 850322122 (Tel: 6029950822)
Registered at 3815 E BELL RD, STE 2200, PHOENIX, AZ 850322122 (Tel: 6029950822)
Recorded as MICHAEL STUMPF, D.O.
Surgery (license number reported to NPPES: AZ 4658)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Phoenix
- Dr. Steven Simon, MD
- Dr. Christopher Knapp, MD
- Dr. Mohan Ramalingam, MD
- Dr. Vanessa Miller, MD
- Dr. Jon Nelson, DO
- Dr. Antonino Cammarata, DO
More public profiles in Arizona
Directory navigation, in NPI number order.
- Cheryl Mejia, DO Physical Medicine & Rehabilitation · Tucson
- Ngoc Bich Pham, PharmD Pharmacist · Phoenix
- Aida Amado, MS, ACNP-BC Nurse Practitioner - Acute Care · Mesa
- James Heaton, DDS Dentist · Chandler
- Brent Smoots, MD Internal Medicine · Peoria
- Courtney Howell, PharmD Pharmacist · Phoenix
- Erica Vice, PA-C Physician Assistant - Medical · Phoenix
- Eric Ovalle, PA-C Physician Assistant · Avondale
- Debjit Saha, MBBS Internal Medicine - Critical Care Medicine · Scottsdale
- Lisa Stanley, APN Nurse Practitioner - Family · Bullhead City
- Ellen Kulesa, CRNA Nurse Anesthetist, Certified Registered · Tucson
- Christopher Anderson, PT Physical Therapist · Gilbert
Mailing Address
29455 N. Cave Creek Rd Ste #118-451
Phoenix, AZ 85331
Phone: 8444367874